diff --git a/weboffice/collabora.yml b/weboffice/collabora.yml
index fe1bb33..d18a8e1 100644
--- a/weboffice/collabora.yml
+++ b/weboffice/collabora.yml
@@ -41,6 +41,10 @@ services:
     volumes:
       # configure the .env file to use own paths instead of docker internal volumes
       - ${OC_CONFIG_DIR:-opencloud-config}:/etc/opencloud
+      # Mount local TrueType fonts so the container can use system fonts
+      # (e.g. Microsoft fonts like Arial, Calibri, Cambria by installing the `ttf-mscorefonts-installer` package).
+      - /usr/share/fonts/truetype:/usr/share/fonts/truetype/more:ro
+      - /usr/share/fonts/truetype:/opt/cool/systemplate/usr/share/fonts/truetype/more:ro
     logging:
       driver: ${LOG_DRIVER:-local}
     restart: always
@@ -68,8 +72,8 @@ services:
     logging:
       driver: ${LOG_DRIVER:-local}
     restart: always
-    entrypoint: ['/bin/bash', '-c']
-    command: ['coolconfig generate-proof-key && /start-collabora-online.sh']
+    entrypoint: [ '/bin/bash', '-c' ]
+    command: [ 'coolconfig generate-proof-key && /start-collabora-online.sh' ]
     healthcheck:
       test: [ "CMD", "curl", "-f", "http://localhost:9980/hosting/discovery" ]
       interval: 15s